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8. Place the air filter/muffler cover over the back of
the carburetor and muffler.
NOTE: The choke control must be in the PARTIAL
choke position (B) to install the air filter/muffler cover.
See Figure 14.
9. Insert the four (4) screws into the holes in the air
filter/muffler cover and tighten. See Figure 14.
Use a flat blade or # T20 Torx bit screwdriver. Do
not over tighten. Do not force.
Figure 17
Figure 18
Replacing The Spark Plug
Use a Champion RDJ7Y spark plug (or equivalent).
The correct air gap is 0.020 inch (0.5 mm). Remove
the plug after every 50 hours of operation to check its
condition.
1. Stop the engine and allow it to cool. Grasp the
plug wire firmly and pull the cap from the spark
plug.
2. Clean dirt from around the spark plug. Remove
the spark plug from the cylinder head by turning a
5/8 in. socket counterclockwise.
NOTE: Replace cracked, fouled or dirty spark plug.
3. Set the air gap at 0.020 inch (0.5 mm) using a
feeler gauge. See Figure 17.
CAUTION: Do not sand blast, scrape, or
clean electrodes. Grit in the engine could
damage the cylinder.
4. Install a correctly gapped spark plug in the cylin-
der head. Tighten by turning the 5/8 inch socket
clockwise until snug.
If using a torque wrench torque to;
110-120 in.•lb. (12.3-13.5 N•m).
Do not over tighten.
0.020 inch
(0.5 mm)
Line Installation
This section covers both SplitLine™ and standard
single line installation.
Always use manufacturer’s 0.080 inch (2.03 mm)
replacement line. Line other than specified may make
the engine overheat or fail.
WARNING: Never use metal-reinforced
line, wire, chain, or rope, etc. These can
break off and become a dangerous pro-
jectile.
There are two methods to replace the trimming line.
• Wind the inner reel with new line
• Install a prewound inner reel
Winding the Existing Inner Reel
1. Hold the outer spool with one hand and unscrew
the Bump Knob counterclockwise. Inspect the
bolt inside the Bump Knob to make sure it moves
freely. Replace the Bump Knob if damaged. See
Figure 18.
2. Remove the inner reel from the outer spool. See
Figure 19.
3. Remove spring from the inner reel. See Figure 19.
4. Use a clean cloth to clean the the inner reel,
spring, shaft, and inner surface of the outer spool.
5. Check the indexing teeth on the inner reel and
outer spool for wear. If necessary, remove burrs
or replace the reel and spool. See Figure 20.
NOTE: SplitLine™ can only be used with the inner
reel with the slotted holes. Single line can be used on
either type of inner reel. Use figure 21 to identify the
inner reel you have.
NOTE: Always use the correct line length when
installing trimming line on the unit. The line may not
release properly if the line is too long.
Bump Knob
Bolt